Pneumatic rotary motor



April 1 1924.

l.. cARDlNl PNEUMATIO ROTARY MOTOR Fiiea Aug.' v. 1920 2 Sheets-Sheet 1.a @a a 8 1,488,528 L. CARDINI PNEUMAT'IO ROTARY MOTOR Fild'Aug. '1,1920 2 sheets-sheet a all ily 4.

a 8 y Even/*bor April l ,1924;

all

Patented Apr. l, 1924.

nur'

masas LUIGI onianmr, or MILAN, irALY.

PNEUMATVIC ROTARY ivio'ro'n.Y

Application ledAugust 7, 1920. SerialNo. 401,841.

To all whomvz't may concern:-

Be it known that LUrGI CARDINI, a subject of the Kingdomofltaly,residing at Milano, Corso `Buenos Ayres 10, Italyyhas.

invented certain new and useful Improvements in Pneumatic RotaryMotors,of which the following is a specification. f

This invention relates to improvements in rotary pneumatic motors andthe primary object of the invention is to provide a motor of simple and*inexpensive construction which may be driven at high speed withoutliability of injuring any of the parts.

With the foregoing object outlined and with other objects in view whichwill appear as theV description proceeds, the invention consists of thenovel features herein after described in detail, illustrated in theaccompanying drawings and more particularly pointed out in the appendedclaim.

Referring to the drawings:

Figure 1 is a vertical sectional View of the improved motor taken on theline 1-1 of Fig. 3;

Fig. 2 is a horizontal sectional view taken on the line 2-2 of Fig. 1; y

Fig. 3 is a. horizontal sectional view taken on the line 3 3 of Fig. 1;

Fig. 4 is a vertical sectional view taken on line 4-4 of Fig. 3; and

Fig. 5 is a detail sectional'view of the distributing valve employed inconnection with the motor.

In the drawings 1 designates a block or casing provided with an internalcylindrical bore 2 having its ends closed by portions of the casing 1.Mounted in the casing 1 and extending through the bore 2 is a rotatableshaft 3 provided with an internaliluid passageway 3 that functions asthe exhaust pipe of the motor. The shaft is provided with a plurality ofeccentrics 4 around which are arranged collars 7, and ball bearings 5and 6 are arranged'between the eccentrics and the collars so as toprevent friction.

The casing 1 is provided with two series of radially arranged bores 8 inwhich are slidably mounted pistons' a. It is to -be noted that the bores8 of the upper series are arranged at 45 relatively to the bores of thelower series.

The outer ends of the boresl of the lower series communicate with airpassageways a, the upper ends of which terminate in ports g which arearranged at 90 apart around the 'axis of the shaft 3. The outer ends ofthe bores'8 of theupper series communicate with similar air passagewaysa which terminate in ports g which are also arranged at 90 apart aroundthe axis of the shaft 3 and arev located nearerto the shaft than theports g. `Attention is called to the fact that each port ports g.

Arranged at the head of the casing is a g is arranged between two ofthek valve lcasing having lan internal annular chamber 13 and an inletpassageway 11. A

disk valve 10 is arranged within the chamber 13 and fixed to the shaft 3by means of a key 3a. As best shown in Fig. 3 the valve is provided witha peripheral notch 14 and a conduit 14', the notch and conduit as` bestshown in Fig. 4 extending from the top to the bottom surface of thevalve. The valve is also provided with a curved passageway 15 that isarranged close to the axis of the shaft 3. l Another curved passageway16 is arranged further away from the axis of the shaft 3 andcommunicates with the passageway 15. Both passageways 15 and 16communicate at all times with the exhaust passageway 3.

In operation, air or other motive fluid enters the chamber 13 and Howsthrough the notch 14 or port 14 into one or the other of the passagewaysa and a and thus enters the outer end of one of the bores 8 and acts onthe piston contained therein. The piston forces` the eccentric 4 withwhich it cooperates to move and thus results in an angular rotation ofthe shaft 3.

This rotation causes the valve 10 to uncover a succeeding port g or gand the motive fluid then enters another bore 8 through the port lastuncovered, while the valve covers'the port first opened and one of thepassageways 15 or 16 communicates with the port first opened to permitthe fluid to exhaust from the bore to which the fluid was firstadmitted.

From the foregoing I believe that the construction, arrangement andadvantages of` the invention may be readily understood yby those skilledin the art, and I am aware that various changes may be made in theconstruction illustrated without departing from the spirit of theinvention as expressed in the following claim.

What I claim and desire to secure by Letters Patent is:

A fluid power motor comprising a casing provided with a central bore andseries of radially arranged bores communicating therewith, the bores ofone series being arranged at 45 relatively to the bores of the otherseries and the series being in parallel planes perpendicular to the axisofthe oentral bore7 a Vrotatable shaft extending through said easing,oppositely arranged ee- Y eentries mounted on said` shaft, ringssurrounding said eeeentries, anti-frietion rolling elements between theeeeentrios and rings, pistons slidably mounted in said bores andengaging said rings, said pistons being unsecured to one another or tosaid rings7 a passageway connected to the outer end of tioned easingand-having an inlet, a disk valve fixed to said shaft and rotatingwithin the valve easing, said shaft being hollow and the valve. beingprovided with areshaped exhaust passageways in constant communicationwith the hollow interior of said shaft, one of said aro-shaped exhaustpassageways having a shorter radius than the other arc-shaped exhaustpassageway and adapted to eooperatewith the passageways of 'ther radialbores which terminate nearest the axis of the central bore, said valvebeing also provided with a peripheral, notch and a port for admittingmotive fluidl t0 the passageways which @Qmmunsate With f vsaidradialbores.

In testimony whereof I affix my signature.

new CARDINI-

